Abstract

We report magnetic-field-dependent small-angle neutron scattering (SANS) experiments on a Nd2Fe14B/Fe3B nanocomposite. For the two scattering geometries where the applied magnetic field is either perpendicular or parallel to the incoming neutron beam, we have independently analyzed the field-dependent SANS data in terms of micromagnetic theory, taking into account demagnetizing-field effects. The approach in reciprocal space is supported by an analysis of the data in real space and provides consistent results for the exchange-stiffness parameter and the mean magnetic anisotropy-field radius.

We thank the FNR of Luxembourg (ATTRACT Project No. FNR/A09/01 and AFR Project No. 896446) for financial support. The TEM characterization has been performed at the Karlsruhe Nano Micro Facility (KNMF), a large-scale infrastructure operated by the Helmholtz Society at the Karlsruhe Institute of Technology (KIT). We would like to thank Robby Prang for the TEM sample preparation.

Key Topics

[Magnets or magnetic bodies characterised by the
magnetic materials therefor; Selection of materials for their magnetic
properties, Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties]